First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST).
Frequency Response: 10-20000 Hz
Impedance：16ohms（including cable）
Sensitivity (at 1kHz)：116dB spl (1mW)
Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...

Esmooth earphones are made of pure ebony from sustainable forests in Malaysia, and may well be the lightest earphones you will ever wear. Weighing less than an ounce - they are so comfortable, you will barely notice you are wearing them. They are designed to fit snugly and are classified as an "in-ear" style of earphone compared to outer or "over the ear" models.
Since the...